Buffing-machine



1. KELLER.

BUFHNG MAcHrNE. APPLICATION FILED MAY 24, 1919.

Patented Sept. 2 7, 1921.

4 SHEETS-SHEET l 1. KELLER.

BUFFING MACHINE- APPLICATION EILED MAY 24, |919- 1,392,172. PatentedSept, 27, 1921..

- 4 SHEETS-SHEET 2.

u1. KELLER.

BUFFING MACH|NE.`

I n APPLICATION FILED MAY 24,11919. 1,392,172. PatentedSept. 27, 1921 C 4 SHEETS-sneer a,

I. KELLER.

BUFFING MACHINE.

APPLICATION FILED MAY 24, 1919.

11,392,172.' Pandsept. 27,1921.

LUNITED STATES PATENT OFFICE.

JOSEPH KELLER, or BUFFALO, NEW Yoan.

:summe-MACHINE.

1,392,172. Application mea May 24,

To all whom t may concern Be it known that I, JOSEPH KELLER, a citizen of the United States of America, residing` in the city of Buffalo, county of Erie, and State of New York, have invented certain new and useful Improvements in Buiing-Machines, lof which thefollowing is a full, clear, and exact description.

My invention relates generally to buiiing machines and more particularly to machines for buiiing objects having curved surfaces which are rotated while being bufied.

. `The principal object of my invention has been toprovide a machine of this type i1. which the work shall be vautomatically moved back and forth across the buiing wheel at a constant rate of speed, while it is being rotated.

- Another object has been to provide a niachine provided with a plurality of workpiece holders or chucks, whereby nished work-pieces may be removed and unfinished pieces 'chucked in the machine while it is operating upon other work-pieces.

Another` object has been to provide a machine in which the time required to change work-pieces may be reduced to a" minimum whereby the output of the machine is greatly increased.

Furthermore,'my invention is so designed as to be easily operated, and is of such sturdy construction that it kwill not easily get out of order. 'Vj j v The above objects and advantages, aswell as others which will be apparent to those skilled in the art, have been accomplished bythe device shown inthe accompanying drawings, of which:

Figure 1 is a side elevation or" my device, partly in section. Y

Fig. 2 is an end elevation of the same.

Fig. 3 is a fragemntary sectional plan view taken on line 3-3 of Fig. 1, showing the actuating-screws.

Fig. iis an enlarged side elevation of the actuating-screw bracket.

Fig. 5 is an enlarged sectional end elevation taken on line 5 5 of Fig. 3,'showing the parts illustratedin Fig. 4.

Fig. 6 is an enlarged, fragmentary, sectional view 'oi' the worlrsupport and is taken on line 6-6 of Fig. 2.

Fig. 7 is an enlarged view of the worksupport stem and its indexing device.

Fig. 8 is a fragmentary, sectional,VVV plan Specification of Letters Patent.

Patented Sept. ,27, 1921,

1919. serial No. 299,585. i

View taken on line 8 8 of F ig. 6 and showing a work-support, quick release. Fig. 9 -is an enlarged view of some of the details of the work-support, quick release.

Fig. 1() is an enlarged, fragmentary end elevation of the lower portion of the wor support, and is taken on line 10-10 of Fig. 1.

Fig. 11 is an enlarged view of. Vsome of the details of one of the chuck-brackets. Fig. 12 is an end View of the same. Figs. 13, 14 and 15 are enlarged,detailed views of the chuck operating mechanism.

My Ldevice comprises in general, a builing` standard having two wheels; a work-support arranged in 'front'of each wheel; and means for actuating the Work-support and the chucking devices.

The buiiing standard comprises a housing 20 which .supports the elements of the device. A spindle 21 is rotatably mounted in suitable bearings formed in the upper part of the standard and is provided with a tight pulley 22 and a loose pulley 23, whereby power is connected to the machine. A bulli'-v ingv wheel 24 is carried by each end of the spindle 21. The tight pulley 22 is provided at one end with a peripherally reduced portion, forming a pulley 25, whichis connected to a pulley 26, mounted upon al jackshaft 27 by means of a belt 28. The jackshaft is suitably journaled within the housing20.

29 is the main shaft of my device which is rotatably mounted within the housing 2() and is provided with suitable collars to prevent endy motion'. The jack shaft is connected with the main shaft by a train of gearing, comprising gears 30, 31, 32 and 33.

34 'is a gear housing which is preferably secured to the end of the housing 20, whereby the y, gears will bey protected. and may be submerged in oil or grease. Each -end of the main shaft 29 extends outwardly for some distance beyond the housing 20, and mounted to slideupon each end of this shaft is a work-support 35. Each end of the main shaft 29 is provided with a key-way 36. A bevel gear 37 having a sleeve 38 is mounted upon each endfof the shaft and a key 39, carried by the sleeve 38, engages with the key-way 36, whereby the sleeve may slide vaxially upon the shaft but will rotate therewith. (Fig. 6.) A worksupport `rbracket ,40 is mounted upon the Avv sleeve 38 of the bevel gear and a collar 41, carried by the sleeve, revente the bracket from moving thereon. rotatably carried by the bracket 40 is a shaft 42, vwhich is arranged at right-angles to the main shaft 29. A bevel gear 43, secured to the lower end of the shaft 42 engages with the bevel gear 37 A workwhereby the shaft 42 is driven. support stem 44 surrounds the shaft 42 and its lower end 45 is rotatably mounted within the bracket 40, and held against rotation by vsuitable index means to` be hereinafter defor the ends of these shafts is obtained. A.

bevel gear 53 is mounted upon the inner end ofV each of these shafts. A bevel gear" 54 is securedto the upper end of the'shaft 42 and is in engagement with the bevel gears 53, whereby the mandrel-shafts 49 and 50 wili be rotated in opposite directions. I A mandrel 55 is secured to the outerI end of each of theshafts 49 and 50.

Each of the brackets 40is provided on its side, facing the housing, with an aire-shaped extension 56, having an arcuate slot 57, of T-shaped cross-section. rJihe head 58 of an actuating-screw 59, to be hereinafter described, is engagea-.ble with the 'il -shaped slot 57 of each of the work-support brackets 40. Each of the work-supports 35 is maintained in its normal working position by means of a weight. 60. A. rope or cable 61,` having oneend attached to the weight and the other end attached to the work-support stem 44, passes over a pulley 62, carried'by the housing` (Fig. 2'.)

64 is a detent arm, having-a boss 65 which is rotatably mounted upon the end of the main shaft 29 and adjacent to the worksupp rt bracket 40. The detent arm 64 is also provided with a boss 66 within which the actuating-screw 59 is rotatably disposed. The detent arm of each of the supporting brackets 40, is thus rigidly held against rotation by the shaft 29 and screw 59.V The detent arm 64 extends rearwardly and at its extreme end it is provided with an outwardly extending boss 67. vAn adjusting-nut 68 having a stem 69 is mounted within the boss 67 in such a manner that it may freely oscillate. ik work-support adjustingscrew 70 has its rear end engageable with the nut-68 and is supported near its forward end by means of a bracket 71, secured to the worksupport bracket 40 by means of a bolt 72, permittingv aslight oscillatory motion. A' stop collar 73, (Figs. 8 to 10,) is secured to the screw 7 0 and bears against the rear face of the bracket 71. The forward end of the screw extends to a point within easy reach ofthe operator, and is there provided with a suitable hand-wheel 74.

A quick release for thework-support is provided',l as shown in Figs. 8 to 10, so that the mandrels bearing the work-pieces may be quickly thrown away from the buiing Wheels and quickly moved back to the same position for operation upon a new workpiece. These means comprise a cam .arm 76, pivot-ally attached by the bolt 77 to a bracket 78 carried by the work-support bracket 40. The cam arm 76 is provided at its inner end with a cireularly-shaped cam 79. This cam engages with a stud 80 carried by a yoke 8l. 82 is a release collar, mounted upon the screw'70 and provided withanannular groove, with which the yoke 81 is in engagement, wherebythe screw 70 may be moved in or out of the nut 68, and the distance betweenl the stud 80 and the bolt 77 will be maintained substantially uniform. When the cam arm 76 is pushed to the right of the position shown in Fig. 8, the vcam 79 will serve topush the lever, and hence the worksupport 35 away from the release-collar 82 and the stop-collar 73, whereby the work-- piece will be moved out of contact and some distance away from the .huiiingwheel When new work-piece is ready to be buffed, the cam-arm 76 vis moved back to the position shown in 8, which operation causes the work-support to be returned to the position shown, andthe movement will be stopped by the engagement of the bracket 71 with the stop-collar 73. o It will be understood that the screw 70is never moved exceptwhen it is desired to change the relative locationof the mandrel 5o and the buiting wheel 24. `When the work, vsupport is moved as just described, the end of the actuating-screw 59 with its head 58 willbe moved through the slot 57 of the work-support bracket 40.

is hereinbefore stated, each 1 mandrelhead of-my device is provided with two mandrels. X@ne ofthesemandrels is idle while the opposite mai'idrel is holding a workpiece-in Contact with the bufing wheel. 'L'The tinisned work-piece held by the idle maudrel may be reino-red and another workpierre placed rthereon during the time the other mandrel is in operation. l-So Vas to brine' these -mandrels alternately into operating'position with'the buliing wheel, Vthe index device, hereinbefore referred to, is used. reference to Figs. 6 and 7 it will be seen that the lower end 45 of the work'- support stem 44 is provided with two diathe work-support bracket attached thereto. lt will be seen by referring to Fig. 4 that the collar 116 ot the nut 114 is moved away slightly'from contact with the end of the bracket and that the arm 119 engaging with this collar is also out or' rictional contact with the groove thereof, so that this nut will be 'tree to rotate within the bracket and with the actuating-screw, without imparting axial movement to the screw. Adjustable reverse collars 12() are provided on the actuating-screws, and when each screw has been moved through its predetermined amount of travel, one ot' these collars will come into contact with the rotating nut, for instance, the nut 114 ot Fig. 4 and move both nuts endwise, thereby relieving the nut 115 and causing the yoke 118 to frictionally grasp the nut 114, whereby this nut will become active and the opposite one inactive. The actuating-screw will thus be reversed in its axial movement, and it will be again reversed when it has moved its predetermined amount ot' travel in this direction. The actuating-screws are automatically reciprocated back and forth until operation upon the work-piece is finished. r Carried by each ot' the mandrel-heads 4 a chuck-bracket 123. Each of these brackets comprises a standard 124 secured at its lower end to the mandrel-head46. A cam stud 125 is supported by the standard 124 and is arranged parallel with the mandrel shatts. A quick acting chuck is mounted upon each end of the stud 125, and arranged to engage with the work-piece mounted upon the mandrel. By reference to Fig. 1 and Figs. 11 toA 15 it will be seen, that each quick acting chuck comprises a chuck arm 126 carricd by a head 127. The head is rotatably mounted upon the end ot the stud 125 and is provided with a pin 128, which engages with a cam-shaped slot 129 formed in the end of the stud. This cam is formed with parallel grooves 130 and'131 arranged at opposite sides ot the stud and connected by spiralsshaped groove 132. The cam stud 125 locked in position and as the head 127 is pushed endwise on thestud the pin 128 will travel alongthe'groove 130 then along the spiral groove 132, which will rotate the chuck arm 126 through substantially 1800, (Fig. 12) and then along a portion of the groove 131. rlhe head 127 is provided with an annular groove 133 with which a yoke 134 is engageable. A link 135 is pivotally mounted at one endiupon abracket 136. This bracket is attached to and carried by the cam stud 125. The outer end 'of the link 135 is provided with a slot 137'which engages with a pin 138 carried by the yoke 134. An operating lever 139 is pivotally' attached to the bracket 136, and a link 140 connects this lever with the link 135. By this arrangement, when the lever 139 is opnal slot 141, in which are arranged preferably two bearing collars 142. These bearing collars are movable up and down within the slot and are adjusted in .position by means of a nut143. Passing through each of the bearing collars is a chuck linger 144. Each of these fingers is provided atits outer end with a disk 145, and a spring146, is arranged beneath the disk and between it and the bearing collar. A retaining nut 147 is secured -to the outer end of each finger, whereby it is prevented from being forced out oi the bearing collar. These chuck iin` gers are adjusted so that their aXes will lie slight-ly beyond the outer periphery ofr the mandrel 55 or the work-piece secured there` to, as shown in Fig. 11. This will permit the fingers to be rotated bythe-moving workpiecerand thus provide rolling contact with the work-piece. .The-parts are so adjusted that the springs 146 are placed under tension whenthe chuck is in its normal position.

Then my machine is in operation the work-supporting brackets 40 will be automatically reciprocated at a constant rate of speed, thus carrying one ofthe chucks of each head back and forth across the butfing wheels. `Vhile. the work-piece carried by this chuck is being acted upon, an unbufed work-piece is Vplaced upon the chuck at the opposite end of the mandrel-head and the quick acting chuck operated, as hereinbefore described, to hold the samein position upon the. mandrel. When the work-piece being operated upon is finished, the camV lever 76 or' the worlcsupport, quickrelease 75 is op- 11'0 erated, vwhich will swing the work-support carrying the mandrel-head, away from the butling wheely and almost simultaneously withdraw the index pin- 86 from its engaging hole. As .the workman continues to move the cam lever, the work-support will be swung to its maximum inoperativeposiation. During this time the tapered plug 95 will have rotated the mandrel-head, and the same will `have been locked in its new position by the indexV pin 86. The cam lever '76 is now returned to the position shown in Fig.v 8, whereupon the chuck, bearing the new work-piece, will be brought into operative position. These operations are accomplished lvery quicliy and with great ease, whereby a large amount of work may be bufed. lhile I have described the operation of but vone mandrel-head, it is obvious that the work-pieces of 'both work-sup- 130 zio ports may be changed alternately While the two Work-pieces are being buifed .at one time. rIlie mandrel-heads 46 may be moved around axially so as to adapt the machine to the buiiing of different shaped Work-pieces.V

As for instance when butting the tapered periphery or the face of Work pieces.

While I have shown but one cam stud for the tivo chucks, it is obvious that I may provide a separate stud for each chuck so that it may be movedaxially to bring the cam thereof in. proper position for different kinds of worlcpieces. These and other modifications of the, detailsherein shoivn and described may be made without departing from the spirit of my invention or the scope of the appended claims; and I do not therefore Wish to be limited to the exact embodiment herein shown and described, the form here- .inbefore described being merely a preferred embodiment thereof.

Havingthus described my invention, what I claim is: v

l. A buiiing machine, comprising a spindle, a buiiing Wheel carried by the spindle,

`a plurality of Work-piece chucks, releasing means for the chucks, means, controlled by the releasing means, for alternately placing the chucks, one at a time, into Working position, means for rotating the chucks, and means for reciprocating the chucks.

2. A butfing machine, comprising a spindle, a butling Wheel carried by the'spindle, a Work-support, a Work-piece chuck carried by t-he support, means for holding the support in its opera-tive position, cam means for quickly releasing the Work-support and moving it to its inoperative position, and

V`means for reciprocating the work-piece. 4G i 3. A bu'liing machine, comprising a spindle, a bu'tling Wheel carried by the spindle, a Work-support', a plurality of. Work-piece chucks, carried by the support, cam means for quickly releasing thel support and moving it away from its operative position, and means for simultaneously moving one of the chucks, carrying an unfinished Work-piece, into operative position. Y

d. A bufling machine, comprising a spindle, a buiiing Wheel carried by the spindle, a mandrel for the Work-piece, and a cam actuated chuck associated with the mandrel.

5. A bufng machine, comprising a spindle, a. butiing Wheel carried by the spindle, a mandrel for the Work-piece, and a quickacting chuck associated with the mandrel, comprising a chuck arm having fingers engageable with the Work-piece, and cam actuated means for moving the arm clear of the mandrel.

6. A buthng machine, comprising a spindie, a buiiing wheel carried by the spindle, a mandrel for the Work-piece, and a quickacting chuck associated with. the mandrel, comprising a cam stud, a chuck arm mounted upon the stud and engageable With the cam thereof, and means lfor moving the cam arm axially upon the stud, whereby itvvill be moved clear of the mandrel.

- 7. A' butiing machine, comprising a spindie, a cutting Wheelcarried by the spindle, amandrel for the Work-piece, and a quickacting chuck associated with the mandrel, comprising a chuckarm,l a plurality of chuck fingers adjustably carried by the chuck arm, each chuck finger being rotatably mounted in the chuck arm, and a spring for each linger, whereby the fingersV will vbear flexibly against the Work-piece. v

8. A buttlng machine, comprising a housing, a spindle rotatably mounted in the housing, a bultlng Wheel carried by the spindle, a Work-support, comprising a bracket slidably carried bythe housing, a stem carried by the bracket, a Work-piece chuck mounted kon the upper end of the stem, means for holding the chuck in its operative position, means for adjusting the angle of the chuck, and screw means for reciprocating the Worksupport at a constant rat-e of speed. n

9. A butting machine, comprising a housing, a spindle rotatably mounted in the housing, a butiing wheel carried by thespindle, a Work-support, comprising a bracket carried by vthe housing, a stem carried by the bracket, a Work-piece chuck mounted on the upper end of the stem, means for holding the chuck in itsvoperative position, and kquickV release means for moving the'chuck to its inoperative position.

l0. A bumng machine, comprising a housing, a spindle rotatably mounted in the housing, a buiiing wheel carried by the spindle, ari-oscillatory Work-support, comprising a bracket carried by the housing, a stenrcarby the housing, a stem carried by thefbracket,

a plurality of Work-piece chucks mounted on the upper end of the stem, means for rotating the stem, index'means for successively holding the stem and chucks in operative position.

l2. The combination with a bufling machine, of a Work-support, comprising a bracket, a rotatable stem carried by the bracket, a plurality of Work-piece mandrels at' the upper end of the stem, means for rotating the mandrels, indeX means for the stem, and means for periodically rotating the stem whereby the mandrels are successively brought into operative position.

13, The combination With a batting machine',l of a work-support comprising a bracket, a rotatable stem carried by the bracket, a plurality of work-piece mandrels at the upper end of the stem, a vertical shaft passing through the stem for rotating the mandrels, friction means carried by the shaft and engaging with the stem for rotating the same, and index means for holding the stem in predetermined positions.

141. The combination with a bufling machine, of a work-support, comprising a bracket, a rotatable stem carried by the bracket, a plurality of work-piece mandrels at the upper end of the stem, a vertical shaft passing through the stem for rotating' the mandrels, a tapered plug carried by the shaft and engageable with the stem for rotating the same, and index means forl holding the stem in predetermined positions.

15. A buliing machine, comprising a spindle, a buliing wheel carried by the spindle, a work-support, a work-piece chuck carried by the support, means for holding the support in its operative position, and an adjusting screw for the worlcsupport, means for quickly releasing the work-support and moving it to itsinoperative position, comprising a release collar carried by the screw,` and a cam arm carried by the support and provided with a cam engaging with the release collar. Y

16. A bufling machine, comprising a housing, a spindle rotatably mounted in thev housing, a bufrlng wheel carried by the spindle, a work-support slidably carried by the housing and actuating means for reciprocating the support, comprising an actuat ing screw carried by the housing and pro vided with righthand and leftehand screwthreads, a bracket carried by the housing, a right-hand nut and a left-hand nut rotatably carried by the bracket and engageable with the screw, a yoke carried by the bracket and engageable with the nuts, and meanscarried bythe bracket, whereby the yoke frictionally holds either one of the nuts against rotation.

17. A buiiing machine, comprising a housing, a spindle rotatably mounted in the housing, a bufting wheel carried by the spindle, a work-support slidab'ly'carried by the housing and formed with a T-shaped,

arcuate slot,an actuating screw carried by the housing and provided with a head engaging the slot, means for rotating the screw, and means for axially reciprocating the screw. v

19. A bufhn'g machine, comprising a housing, a spindlev rotatably mounted in the housing, a buiing wheel carried by the spindle, a main shaft rotatably carried by the housing,"means for driving the main shaft, a work-support slidably carried by the ymain shaft, actuating means for reciprocating the support, a work-piece mandrel carried by the support, and means connecting the mandrel with the main shaft.

20. A buliing machine, comprising a housing, a spindle rotatably mounted in the housing, a buliing `wheel carried by the spindle, a main shaft rotatably carried by the housing, a work-support slidably carried by the main shaft, an' actuating-screw carried by the housing and connected with the work-support, .means for driving the main shaft, means for driving the actuating shaft, a work-support mandrel carried by the' support and means connecting the mandrel with the main shaft.

21. A buliing machine, comprising a housing, a` spindle rotatably mounted inthe housing, aV bufing wheel carried by the spindle, a jack-shaft rotatably carried by the housing, a work-piece chuck, means for connecting the jackishaft with the chuck, for rotating the latter, and screw means for automatically reciprocating the chuck across the face of the bufling wheel at a constant rate of speed. l Y

In testimonyv where-of, I have hereunto signed my name. j

' Josnrn KELLER, 

